R. J. Green

Publications (2)8.5 Total impact

• Source

  Available from: Gap Soo Chang

  Article: Identifying local dopant structures and their impact on the magnetic properties of spintronic materials

  R J Green, G S Chang, X Y Zhang, A Dinia, E Z Kurmaev, A Moewes
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  ABSTRACT: The local structures of transition-metal dopant atoms in semiconductor host lattices of dilute magnetic semiconductors are determined using resonant inelastic x-ray scattering. Ligand field multiplet calculations are employed to analyze experimental data and show when dopant atoms substitute into the lattice and when they form metallic or oxide clusters. For ZnO doped with Mn, low-temperature ferromagnetism is shown to be intrinsic, but can be quenched by the formation of MnO clusters. For CeO 2 doped with Co, room-temperature ferromagnetism is due to clusters of Co, while substitution into the lattice leads to paramagnetic behavior.
  Physical Review B 03/2011; 83:115207. · 3.69 Impact Factor
• Source

  Available from: Paul Bazylewski

  Article: Appearance of Ferromagnetism in Co-Doped CeO2 Diluted Magnetic Semiconductors Prepared by Solid-State Reaction

  A. Bouaine, R. J. Green, S. Colis, P. Bazylewski, G. S. Chang, A. Moewes, E. Z. Kurmaev, A. Dinia
  The Journal of Physical Chemistry C 01/2011; 115:1556. · 4.80 Impact Factor